Safety razor



Dec. 6, 1932. J.. MuRos 1,890,333

' SAFETY mzon I Original Fild June 22, 1928 2 Sheets-Sheet ,1

1' I ill I 12 INVENTOR v 32% I I v j rg ATTORNEY Dec. 6, 1932. .1. MUROS 9 SAFETY RAZOR Original Filed June 22, 1928 2 Sheets-Sheet 2 INVENTORI ATTORNEY' Patented Dec. 6,1932

UNITED STATES.

PATENT OFFICE JOSEPH EUROS, OI NEW YORK, N. Y., ASSIGNOR, BY MESNEASSIGNMFINTS, TO GILLETTE SAFETY RAZOR COMPANY, OI BOSTON,MASSACHUSETTS, A. CORPORATION 01' DELL WARE ear-mar men Applicationfiled June 22, 1928, Serial No. 287,645. I Renewed August 25, 1888.

urchase several makes of blades fitting hislade holder to the exclusionof the blades manufactured by the maker of the holder. While undercertain circumstances there is nothing wrong with this practice anextended study of the field reveals the fact that the general public isapt to blame the manufacturer of the holder for'the faults of inferiorblades, resulting in great injury and damage to the reputation of theholder manufacturer.

The main object of the present invention is to provide a blade holderand blade construction which effectively precludes this generalpractice.

Another object of the invention is to provide a simple and eflicientblade holder and blade construction whichis capable of manufacture on acommercial scale, or in other words one which is not so difiicult tomake as to be beyond the reasonable cost of such a contrivance.

g With these and other objects in view, which will more fully appear asthe nature 'of the invention is better understood, the same consists inthe combination, arrangement and construction of parts hereinafterdescribed,

' pointed out in the. appended claims and illus- 85 trated-in theaccompanying drawings, it be- I ing understood that many changes may bemade in the size and proportion of the several parts and details ofconstruction within the scope of the appended claims without departingfrom the spirit or sacrificingany ofthe advantages of the invention.

A few of the many possible embodiments of 1 the invention areillustrated in the accompanying drawings, in which Figure l is a frontelevation of a safety.

razor constructed in accordance with the present invention; Fi 2 is asection taken on line 2-2 of Fig. 1; 'g. 3 is a top plan view of theblade su porting'element of the razor; Fig. 4 is a. iiottom plan view ofthe blade clamping element thereof; Fi 5 is a section taken on line5-5of Fig. 4; ig. 6 is a portion of a section taken on line 6-6 of Fi 2;Fig 7 is a section taken on line 77 of ig. 5; ig. 8 is a plan view ofthe improved blade, showm the blade positioning lugs of the holderinoperative relation to elements of the blade co-operatin'g therewith;Fig. 9 is a section similar to the one shown in Fig. 2, showin the partsassembled before flexing the bla e for use; Fig. 10 is a lon itudinalsection taken throu h a modified lade holder and the blade; Fig. 11 is aplan view of the blade supporting and clamping elements of the modifiedholder; Fig. 12 is a plan view of the blade co-operating with the saidmodified holder; Fig; 13 is a lon itudinal section taken through aportion 0 a still further modification of the invention; Fig. v14: is afragmentary top plan View of the blade support of the modification shownin Fig. 13'; and Fig. 15 is a plan view of a portion of a blade used inthe modification illustrated in Fig. 13.

Referring now first to Figs. 1 to 9, inclusive, of the drawings, whichillustrate the application of the invention to a safety razor of theGillette type, the numeral 20 indicates a blade supportin plate,suitably curved along its longitudinal edges and provided with teeth 21,forming guard-s for the well known purpose. On this plate is adapted torest a transversely flexible blade 22, having longitudinal cutting edges23. This blade is positioned upon its support by lugs 24 on a clampingcap 25, which lugs extend through openings 26 and 27 in the blade andsupporting plate, respectively, the said lugs and the 1 said 0 eningsbeing of a configuration to be more ully described hereinafter.

Thecap is provided with a concaved underface 28, its longitudinal edgesresting on the upper face of the blade. Centrally projects the razorknown in-the tradeas the Gillette from the underface of the cap ascrew-threaded spindle which extends through registering apertures 29and 30 in the blade and razor.

. The positioning lugs 24 are each provided at their free ends with anenlargedhead 32,

the body portion 33 of each lug being cylin-' drical, althou h this isnot essential. The head 32 of eac positioning lug is longitudinallyrooved, as indicated at 34, the rooves exten ing exactly to theperimeter or ing line of the transverse cross-section of the bodyportion of the positioning lug. In the case illustrated,of course, thegrooves extend to the perimeter of the circle of the transversecross-section of the body portion of the said lug. The length of thebody portion of each lug is such that the said body portion extends intothe opening 27 in the supporting late 20 in the assembled positions ofthe e ements of the razor. before flexing the blade as clearly shown in.Fig. 9 of the drawings. The purpose of this arrangement will appearhereinafter. From Figs. 2 and 9 it also a pears that the length of thebody portion. 0 each lug-exceeds the thickness of the blade. v a 4 Theregistering openings 27 and 26 in the supporting platei20 and razorblade,22, respectiv'el are alike in configuration. They follow 0 oselythe contours of the heads 32 of the positioning lugs 24 in the largestcrosssections of the said heads. As appears more specifically from Fig.8of the drawings, these opemngs are substantially star-shaped, althoughthis is not essential, the shape dependmg entirely on the configurationand arrangement of the grooves in the heads of the positioning lugs. Itis, however, essential that each opening 26, 'no matter of what shape itbe, shall be provided with projec-- tlo'ns 35, which extend toward thecenter of the opening, all of the projections terminatmg on theImaginary perimeter or bounding 7 line of a figure which is that'of thetransverse cross-section of the body portion of the po-.

sitioning lug co-operating with said openmg.

As pointed out above, the openings 27 in the supporting plate 20'h'avethe configuration of the openings'26 in therazor blade. This, however,is'not essential. The openings 27 may be of circular shape or any othershape to accommodate the largest transverse crosssection or -the head ofa lug. In any event,. it. s desirable to make the op'enings'27 of othersuitable means.

a size that the heads of the positioning lugs contact with the saidopenings all around, 1n order to prevent relativemovement between theheads of the positioning lugs and the supporting plate in all directionsin the plane of said su porting plate.

In use, th manner, Fig. 9-showin the parts assembled before flexing ofthe hide for shaving. In these positions of the elements the pro]ections 35 in the openings 26 in the blade already abut against thecylindrical body portions'of the supporting lugs, so that when the bladeis flexed by. screwing home the handle 31, the blade is effectivelyprevented from shifting either longitudinally or transversely on thesupporting plate of the razor, or in any other direction save in thedirection of the axes of the positioning lugs.

By reason of the construction of the heads of the positioning lugs andthe configuration of the openings 26 in the blade, it is obvious that,if it is attempted to desi n a blade to fit e razor is assembled in theusual the razor herein described wit out having re-' courseto theprojections 35 in the openings 26 c in the blade, such blade would haveto ave openings of a size corresponding to the largest diameter of thehead 32 of a positioning lug, but then the said blade would shift on thesupporting plate when the handle of the razor is screwed home so as toclamp the blade in shaving position. Of course, if thelength of the bodyportions of the lugs werenot as f described in connection with Fig. 9 ofthe drawings, that is to say if the body portion of each lug were not ofa length so that the outer end of the said body ortion were disposedwithin an opening 27 in the supporting plate when the elements of therazor are assembled before flexing of the blade for use,

the blade would be prevented from shifting on the supporting plate. I V

The modification illustrated in Figs. 10 to 12, inclusive, of thedrawings, difi'ers'from the one above described mainly in thatthesupporting plate 36 and the clamping plate 37 of the razor are joined bya bin e 38, and held in clamping position by a ci 39, or

k In this case e 'positioning lugs 40 are mounted upon the supportingplate and project through openings 41 in the blade 42 into openings 43in the clamping plate 37. The body portions of these lugs are in thecase illustrated quad rangularin transverse cross-section, their heads44 being provided with grooves 45,

which are dis osed around the bounding fig ure of the sai transversesection. The openings 41 in the blade 42 correspond in config samemanner as the openings inthe blades of the razor illustrated in Figs. 1.to-;9., inclusive,

correspond'to the lar p t cross-sections of the heads of thepositioning-lugs shown therein.

The openings 43 in the clam ing plate 37 are in this case quadrangular,tting the heads of the positioning lugs. Attention is called to the factthat the length of the body portions of the lugs is in this instancesuch that the said body portions project into the open ings 43 in theclaminto the openings 0 the element co-operating with the element whichcarries the said lugs. Otherwise the construction and o eration of theelements are the same as 0 those described in connection with Figs. 1 to9, inclusive, of the drawings.

Themodification illustrated in Fi s. 13 to 15, inclusive, includespositioning ugs 46 mounted on one element of the blade holder, forinstance on the supporting plate 47, and

including a body portion 48 of, for instance,

.Vquadrangular cross-section, provided with a portion only.

of the drawings.

head 49 which projects to one side of the body This head is providedwith a single groove 50, which extends exactly to the bounding figure ofthe transverse cross-section of the body portion of the supporting lug,as clearly appears from Figs. 13 and 15 I The blade 51 IS in this caseprovided with an openin 52 of a configuration corresponding to that ofthe largest transverse cross-section of the head 49, and the clampingplate 53 has an opening 54 to receive the said head. The operation ofthis modified razor is obvious from the foregoing, the constructiondifiering from those above described only in that the head of thepositioning lug projects to one side only of the body portion thereof.

It is, of course, obvious that many other modifications'of the head andthe openings co-operating therewith are ossible without departing fromthe invention, which lies mainly in the provision of a positioning lughaving an enlarged head, provided with one or more longitudinal grooves,co-o eratin with an opening in the blade provi ed wit pro ectionsfitting the grooves and being adapted to contact with the body portion 0said lug. 1

What I claim is: r

1. The combination with a blade having one or more openings, of a bladeholder, a

corresponding number of positioning lugs on said holder for co-operationwith said openings, each lug having a body portion and an enlarged head,said head. being provided with, one or more longitudinal groovesextending to the bounding figure of the transverse cross-sectionof thebody portion of the lug, the configuration of each opening-in said bladecorresponding to that of the largest transverse cross-section of'thehead of alug co-operating therewith.

2. The combination w th a blade having one or more openings, Of/a bladeholder, a cor-res-pondin number of positioning lugs on said holder orco-operation with said openings,

ing plates, that is to saylug co-operating therewith and being incontact with the body portion of said lug when said blade is positionedon' said holder.

3. The combmation with a blade having one or more openings, of ablade'holder, a

corresponding number of positioning lugs on said holder for co-operationwith said openings, each lug having a body portion and. an enlargedhead, said head being provided with one or more lon itudinal groovesextending to the bounding gure of the-transverse crosssection of thebody-portion of the lug, each opening in said blade having one or moreprojections adapted to be passed through the grooves in the head of alug and being in contact with the body portion of the lug when saidblade is mounted on said holder.

' 4. In a combination according to claim 1, the length of the bodyportion of each lug exceeding the thickness of said blade.

5. In a combination according to claim 2, the length of the body portionof each lug exceeding the thickness of said blade.

6. In a combination according to claim 3, the length of the body ortionof each lug exceeding the thickness 0? said blade.

7 The combination with a blade having one or more openings, of a bladeholder, 8. corresponding number of positioningjlugs on said holder forco-operation with said 0 enings, each lug having same transversecross-section throughout its length and an enlarged head and each 0ening being of a size to permit passage 0' the head of one of the In sopening being of a con guration whereby its edge contacts withthe odyortion of the respective lug at a plurality o spaced points after thehead of said lug has passed through said openin SKA bla e for a safetrazor having one or more openings adapte to receive positioning lugs ona blade holder provided with enlarged heads, each openin being largeenough to ermit of passage t erethrough of the head 0? a lugco-operating therewith and each opening entially arranged projectionsextending inwardly and defining a circle by their inner edges andarranged to contactat a plurality of spaced points with the bodyportion-of a lug two-operating I therewith after the said head haspassed through said opening.

9. The combination with a blade having one or more openings, of a bladeholder, a cortherethrough, each having a series of circumfera bodyportion 0 the respondingnumber-iof positioning lugs upon w the groovedhead of a lug opening being of a con same transverse cross-sectionthroughout its length and an enlarged head with diverging grooves in itsperiphery and each opening being of a size to ermit passage of terethrough, each ration whereby a portion of each edge of t e openingcontacts with the bed portion of the respective lug after the hea ofsaid lug has passed throug said opening so as to prevent the blade fromshifting in its plane in any direction in rela tion to alugco-o'perating therewith when k a blade is mounted-on said holder.

10. The combination with a blade having one or more openings, of a bladeholder, a corresponding number of positioning lugs on said holder forco-operation with said openings, each lug havinga body'portion and anvenlarged vhead and each opening bein of a size to permit passage of thehead 0 9. lug therethrough, and a series of circumferential- A -lyarranged projections integral with said blade and associated witheachopening for symmetrically and directly engaging the body of the lugby point contact upon all sides thereof to prevent the blade fromshifting in its plane in any direction in relation to a lug co operatingtherewith when the blade is mounted upon said holder.

11. A blade for a safety razor having one .or more openings adapted toreceive positioning lugs with enlarged heads, each opening being largeenough to permit of passage 'therethrough of the head of the lugco-operating therewith and each opening being providedwith a series ofually spaced circumferentially arranged ra ially extending projectionsadapted to .contact symmetrically with the bodyvof the lug on all sidesthereof and positively .to locate the blade in the holder. a

12. A blade for a safety razor having one or more openings thereinadapted to receive positioning lugs having uniformly corrugated heads,each opening being provided with a series of uniformly spacedprojections radially converging and terminating at their inner ends ina, circle of less diameter than thatof the corrugated head.

13. A blade for a safety razor having a blade locating opening'thereinadapted to receive a positioning lug of substantially circular contour,the opening in the blade being 'subtsantially star-shaped and'having-initsedge a plurality of uniforml s ly converging projections de acedinwarding at their 1 inner ends a circle of substantially the same vdiameter as the lug, whereby the lugmay be engaged on all sides by pointcontact of said projections to prevent shifting of the bla'de initsplane in anydirec'tiom v p v-14. A blade for a safety razor havingone ing being large enough to permit passage therethrough ,of the headof a lug andeach" opening having a series of circumferentially arrangedprojections extending inwardly and defining acircle by their inner edgesand ar- '70 ranged to contact with-the body portion of a lug at pointsuniformly distributed about its or more openings each adapted to receivea positioninglug provided with an enlarged symmetrical head at its 'freeend, eachopenentire geriphery and co-operating therewith after t 0 saidhead has passed through-said opening. 4 75 Signed at New York, in thecounty of New York, and State of New York, this 21st day of June,-A. D.1928. v

y JOSEPH MUROS.

I an

